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    <title>多模态网络诈骗识别和预警系统</title>
    <link rel="stylesheet" href="css/style.css">
    <style>
        .welcome-section {
            text-align: center;
            padding: 40px 20px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            margin-bottom: 30px;
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        .welcome-section h1 {
            color: #2c3e50;
            margin-bottom: 15px;
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        .welcome-section p {
            color: #666;
            font-size: 16px;
            line-height: 1.6;
            max-width: 800px;
            margin: 0 auto;
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        .stats-section {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 30px 0;
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        .stat-card {
            background: white;
            padding: 20px;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
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        .stat-number {
            font-size: 24px;
            font-weight: bold;
            color: #3498db;
            margin: 10px 0;
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        .modules-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
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        .module-card {
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            transition: transform 0.3s;
        }
        
        .module-card:hover {
            transform: translateY(-5px);
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        .module-card h3 {
            color: #2c3e50;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
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        .module-icon {
            width: 24px;
            height: 24px;
            margin-right: 10px;
            color: #3498db;
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        .module-features {
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            margin: 15px 0;
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        .module-features li {
            margin: 8px 0;
            color: #666;
            display: flex;
            align-items: center;
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        .module-features li:before {
            content: "✓";
            color: #2ecc71;
            margin-right: 8px;
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        .module-link {
            display: inline-block;
            padding: 8px 20px;
            background: #3498db;
            color: white;
            text-decoration: none;
            border-radius: 5px;
            margin-top: 15px;
            transition: background 0.3s;
        }
        
        .module-link:hover {
            background: #2980b9;
        }
    </style>
</head>
<body>
    <div class="container">
        <!-- 左侧导航栏 -->
        <nav class="sidebar">
            <div class="logo">
                <h2>多模态网络诈骗识别和预警系统</h2>
            </div>
            <ul class="nav-links">
                <li><a href="text.html" class="nav-link">文字识别预警</a></li>
                <li><a href="audio.html" class="nav-link">语音识别预警</a></li>
                <li><a href="image.html" class="nav-link">图像识别预警</a></li>
                <li><a href="video.html" class="nav-link">视频识别预警</a></li>
            </ul>
        </nav>
        
        <!-- 主要内容区域 -->
        <main class="main-content">
            <div class="welcome-section">
                <h1>欢迎使用多模态网络诈骗识别系统</h1>
                <p>基于深度学习和人工智能技术，为您提供全方位的网络诈骗识别和预警服务。
                   本系统支持文字、语音、图像和视频等多种形式的内容分析，帮助您有效防范网络诈骗风险。</p>
            </div>

            <div class="stats-section">
                <div class="stat-card">
                    <h3>识别准确率</h3>
                    <div class="stat-number">95%</div>
                    <p>基于深度学习模型</p>
                </div>
                <div class="stat-card">
                    <h3>平均响应时间</h3>
                    <div class="stat-number">2.5s</div>
                    <p>快速识别分析</p>
                </div>
                <div class="stat-card">
                    <h3>支持格式</h3>
                    <div class="stat-number">15+</div>
                    <p>多种文件格式</p>
                </div>
                <div class="stat-card">
                    <h3>更新频率</h3>
                    <div class="stat-number">24h</div>
                    <p>实时特征库更新</p>
                </div>
            </div>

            <div class="modules-grid">
                <div class="module-card">
                    <h3>
                        <span class="module-icon">📝</span>
                        文字识别预警
                    </h3>
                    <p>智能分析文本内容，识别潜在诈骗风险</p>
                    <ul class="module-features">
                        <li>支持多种文本格式</li>
                        <li>实时监测和分析</li>
                        <li>智能风险等级评估</li>
                        <li>详细分析报告</li>
                    </ul>
                    <a href="text.html" class="module-link">开始使用</a>
                </div>

                <div class="module-card">
                    <h3>
                        <span class="module-icon">🎤</span>
                        语音识别预警
                    </h3>
                    <p>分析语音内容，识别诈骗话术特征</p>
                    <ul class="module-features">
                        <li>支持实时录音检测</li>
                        <li>多种音频格式支持</li>
                        <li>语音转文字分析</li>
                        <li>情感语气识别</li>
                    </ul>
                    <a href="audio.html" class="module-link">开始使用</a>
                </div>

                <div class="module-card">
                    <h3>
                        <span class="module-icon">🖼️</span>
                        图像识别预警
                    </h3>
                    <p>智能识别图片中的诈骗相关元素</p>
                    <ul class="module-features">
                        <li>OCR文字识别</li>
                        <li>场景内容分析</li>
                        <li>二维码安全检测</li>
                        <li>UI仿冒识别</li>
                    </ul>
                    <a href="image.html" class="module-link">开始使用</a>
                </div>

                <div class="module-card">
                    <h3>
                        <span class="module-icon">🎥</span>
                        视频识别预警
                    </h3>
                    <p>全方位分析视频内容中的诈骗风险</p>
                    <ul class="module-features">
                        <li>多模态内容分析</li>
                        <li>实时风险监测</li>
                        <li>场景特征识别</li>
                        <li>语音内容分析</li>
                    </ul>
                    <a href="video.html" class="module-link">开始使用</a>
                </div>
            </div>
        </main>
    </div>
    <script src="js/common.js"></script>
</body>
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